Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM1992CARAVAN FWD V6-201 3.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULEDESCRIPTION AND OPERATIONMODES OF OPERATIONCLOSED LOOPDECELERATION
1992 Dodge and Ram Caravan FWD V6-201 3.3L
Deceleration
1992 Dodge and Ram Caravan FWD V6-201 3.3LSECTION Deceleration
PCM MONITORS:
- Engine Temperature (ECT Sensor)
- Manifold Vacuum (MAP Sensor)
- Throttle Position (TPS)
- Exhaust Gas Oxygen Content (HO2S)
- A/C Switch Status
- Battery Voltage
- Camshaft and Crankshaft Position (CMP and CKP Sensors)
UNDER NORMAL DECELERATION, PCM:
Continues normal (reduced) injection.
De-energizes EGR system, by grounding Electronic EGR Transducer (EET) solenoid.
UNDER HARD DECELERATION, (CLOSED THROTTLE AND ABRUPT INCREASE IN MANIFOLD VACUUM) THE PCM:
Ignores oxygen sensor input, and initiates fuel cut-off strategy, firing injector only once per engine revolution.
Disables EGR system, by grounding EGR solenoid.
Disables EVAP purge system, by grounding EVAP solenoid.
- Engine Temperature (ECT Sensor)
- Manifold Vacuum (MAP Sensor)
- Throttle Position (TPS)
- Exhaust Gas Oxygen Content (HO2S)
- A/C Switch Status
- Battery Voltage
- Camshaft and Crankshaft Position (CMP and CKP Sensors)
UNDER NORMAL DECELERATION, PCM:
Continues normal (reduced) injection.
De-energizes EGR system, by grounding Electronic EGR Transducer (EET) solenoid.
UNDER HARD DECELERATION, (CLOSED THROTTLE AND ABRUPT INCREASE IN MANIFOLD VACUUM) THE PCM:
Ignores oxygen sensor input, and initiates fuel cut-off strategy, firing injector only once per engine revolution.
Disables EGR system, by grounding EGR solenoid.
Disables EVAP purge system, by grounding EVAP solenoid.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.